https://ru.wikipedia.org/wiki/%D0%A1%D0%B0%D0%B4_%D0%B7%D0%B5%D0%BC%D0%BD%D1%8B%D1%85_%D0%BD%D0%B0%D1%81%D0%BB%D0%B0%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D0%B9_ (%D1%82%D1%80%D0%B8%D0%BF%D1%82%D0%B8%D1%85_%D0%91%D0%BE%D1%81%D1%85%D0%B0)
левая створка
